<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <a href="http://www.baidu.com">百度</a>
    <button id="btn">跳转百度</button>
    <script>
        // a标签是什么类型的导航  声明式导航
        // 响应button的点击事件, 完成跳转功能, 这种属于什么类型的导航 
        var btn = document.querySelector('#btn')
        btn.onclick = function() {
            location.href = 'http://www.baidu.com'
        }
    </script>
</body>

</html>